Anyone who gets your mnemonic phrases can gain control of your assets. Huobi Wallet wishes to remind you that you must immediately transfer your assets after you find out that your mnemonic phrases have been leaked or gone missing in order to ensure the safety of your assets.
The specific steps are:
Create a wallet, then write the mnemonic phrases down on a physical medium (such as paper) and make sure them is safely kept. Once you have done this, transfer your assets to the new wallet address.